Question: When was the Eiffel tower built?
Paraphrase: What was the date on which the Eiffel Tower was built?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q243 p:P3893 ?s . ?s ps:P3893 ?x filter(contains(YEAR(?x),'1993')) . ?s pq:P1001 ?value}